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Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm

Brand:|Model: GW-S525/8|Part # 290-302
These silver polymer cone woofers feature a cosmetic stamped steel frame, vented and bumped back plate, and high-quality rubber surround. The relatively shallow profile, polymer construction, and T/S parameters make them great for automotive environments.
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Part # 290-302
  • Poly cone and rubber surround is ideal for harsh environments
  • Vented pole piece improves power handling
  • Cosmetic frame looks good without countersinking
  • Bumped back plate increases mechanical excursion

Product Details

Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm

These silver polymer cone woofers feature a cosmetic stamped steel frame, vented and bumped back plate, and high-quality rubber surround. The relatively shallow profile, polymer construction, and T/S parameters make them great for automotive environments.

Product Specifications
  • Nominal Diameter5-1/2"
  • Power Handling (RMS)70 Watts
  • Power Handling (max)130 Watts
  • Impedance8 ohms
  • Frequency Response50 to 5,500 Hz
  • Sensitivity84.7 dB 2.83V/1m
  • Voice Coil Diameter1"
  • Magnet Weight15 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)81.1 Hz
  • DC Resistance (Re)7 ohms
  • Voice Coil Inductance (Le)0.4 mH
  • Mechanical Q (Qms)2.87
  • Electromagnetic Q (Qes)1.18
  • Total Q (Qts)0.84
  • Compliance Equivalent Volume (Vas)0.13 ft.³
  • Mechanical Compliance of Suspension (Cms)0.4 mm/N
  • BL Product (BL)5.41 Tm
  • Diaphragm Mass Inc. Airload (Mms)9.7g
  • Maximum Linear Excursion (Xmax)2 mm
  • Surface Area of Cone (Sd)82.29 cm²
Materials of Construction
  • Cone MaterialPoly
  • Surround MaterialRubber
  • Basket / Frame MaterialSteel
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter5.625"
  • Baffle Cutout Diameter4.56"
  • Depth2.5"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.21 ft.³
  • Sealed F388 Hz
  • Vented Volume0.55 ft.³
  • Vented F348 Hz
Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm
  • BrandGoldwood
  • ModelGW-S525/8
  • Part Number290-302
  • UPC643420100501
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (12 Reviews)
  • Weight1.6 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

View similar products to the Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm
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Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm
Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm is rated 3.75 out of 5 by 12.
Rated 2 out of 5 by from Not the same sound I had in my bmwAll I can say is you get what you pay for!!!!!!!!!!
Date published: 2015-02-23
Rated 5 out of 5 by from 2001 740I e38 Rear Deck Speakers/WoofersI used 4 of them to replace the blown original rear deck woofers on a 2001 740i e38 BMW. They sound as good as the originals and were a pretty good fit in the existing cutouts but you have to drill new holes. Great price for the sound.
Date published: 2014-10-25
Rated 4 out of 5 by from Very good midrange sound reproductionI needed to replace the 2 decade old Pioneer floor speakers but did not want to throw out these cabinets either so i opted to replace the speakers within the cabinet. The woofer was definitely needing replacing since the original was bare minimum in performance and power handling. the same goes for the mid-range and the tweeter had been blown many years prior. The internal passive 3-way crossover was about the size of a quarter and again just would not cut it for my needs and this project so it was replace with beefy 3-way passive crossover.Sub-woofer: Hifonics 12' DVC 4 Ohm wired in series for an 8 ohm load.-purchased elsewhereMid-Range: Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm-bought hereTweeter: Vifa BC25SC06-04 1" Textile Dome TweeterPart # 264-1028- bought here3-way passive crossover network: EMB Professional 4 or 8 ohm crossoverFrequency ranges:Woofer Frequency: 20Hz-500HzMidrange - 500HZ-3.5KHZTweeter - 4.5KHZ-20KHZ600 watts RMS/1200 watts peak -
Date published: 2014-07-18
Rated 4 out of 5 by from Very powerful little wooferI bought this woofer about a month ago, and am very impressed with its frequency response. I purchased 1 of these and 2 of part #299-825. And not only does this woofer outperform those subwoofers in every way, they also perform better at a higher volume, as the subwoofers make an audible rubber flapping noise when turned up too high. The only reason why I did not rate this product 5 stars is that the dust cap is a noticeably different shade of white compared to the cone of the speaker. Other than that, this product is an amazing buy, at a fantastic price.
Date published: 2014-05-07
Rated 1 out of 5 by from Cheap for a reasonTruthfully terrible.I bought four of these to replace the rear woofers in my 1997 BMW 740il. As soon as I installed these, I rushed to get them out. They don't cover one third of the frequencies the factory woofers put out and sound foul. Almost no bass and the bass that came out of them sounded distorted. Re-installed the factory woofers and threw these back in the box. Don't waste your money...even if it is not alot.
Date published: 2013-04-04
Rated 5 out of 5 by from Great sound from a small SUBWOOFERI found these subwoofers through reading an Automotive Forum.My stocks factory ones were old and did not sound good.I ordered 4 of these Goldwood 1/4 8 ohm subwoofers, at an amazing price, I thought I can give them a try while looking for my used or refurbished stock ones, since dealer wants $100 a peace. I finally received these and installed them right away,Amazing sound for the $! I am keeping these in the car.The staff at Parts Express is Great, Tech support, via E-mailWas great! I am in California, so it took a few days to deliver,Next order I will use quicker shipment..I already recommended this Company and the product to friends Family and BMW forum members!Thank You.
Date published: 2013-03-07
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Goldwood GW-S525/8 5-1/4" Poly Cone Woofer 8 Ohm

Similar to rayp72's question about the BMW 7series spkrs. The BMW OEM's have a ~5 7/8" bolt circle. I'm wondering what the bolt circle is on these.

Asked by: tomh922
The bolt circle on this woofer is 5-1/4".
Answered by: MattP
Date published: 2015-03-02

Will these woofers be OK along with Goldwood GT-510 tweeter and 260-198 crossover (crossed at 500Hz)? If not, what's the best frequency they should be crossed?

Asked by: Big_Louis_1971
This combination will work well with any crossover frequency between 3,000 and 5,000 Hz. That crossover will be a good choice.
Answered by: MattP
Date published: 2014-08-11

will these work as a replacement for the four rear deck subs in a 1997 bmw 740 il?

Asked by: rayp72
The BMW calls for 5-1/4" speakers, although these Goldwoods actually measure closer to 6". If they fit the stock cutouts, new mounting holes may need to be drilled.
Answered by: MattP
Date published: 2014-03-18

How is the 5-1/4" size measured? I'm not sure if it's the correct size I need.

Asked by: Helson351
A speaker size is measured by the overall frame diameter of the speaker. 5-1/4" is just a size catagory for this woofer, it actually measures 5-5/8" across the frame. The specific dimensions are listed in the description for all of our woofers.
Answered by: MattP
Date published: 2014-07-20
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